rake 任务使客户积分余额过期

Question

我正在尝试编写一个每天运行的 rake 任务，并找到剩余天数为 0 的位置以将列数量更新为零。

我在我的模型中定义了以下方法，但它们似乎并没有完全起作用，因为我在视图中收到以下错误

undefined method `-@' for Mon, 27 Jun 2016:Date

def remaining_days
    expired? ? 0 : (self.expire_at - Date.today).to_i
  end

  def expired?
    (self.expire_at - Date.today).to_i <= 0
  end
def expire_credits
    if expired?
      self.update(:expire_at => Date.today + 6.months, :amount => 0)
    end
  end

对于我从未写过的佣金任务，我认为我可以调用 StoreCredit 的方法，如果满足某些条件，该方法会使积分过期，但我不确定这一切是如何工作的

task :expire_credits => :environment do
  puts 'Expiring unused credits...'
  StoreCredit.expire_credits
  puts "done."
end

Answer 1

你调用了class方法但定义了实例方法。您将需要定义 class 方法：

def self.expire_credits

Answer 2

# model/store_credit.rb
# get all store_credits that are expired on given date, default to today
scope :expire_on, -> (date = Date.current) { where("expire_at <= ?", date.beginning_of_day) }

class << self
  def expire_credits!(date = Date.current)
    # find all the expired credits on particular date, and update all together 
    self.expire_on(date).update_all(amount: 0)
  end
end

既然是rake任务，我觉得把所有过期的一起更新效率更高

#rake file
result = StoreCredit.expire_credits!
puts "#{result} records updated"

Retrieve Record Count Update

class << self
  def expire_credits!(date = Date.current)
    # find all the expired credits on particular date, and update all together 
    records = self.expire_on(date)
    records.update_all(amount: 0)
    records.length
  end
end

rake 任务使客户积分余额过期

rake task to expire customers points balance

rake

activerecord

ruby-on-rails